Online Parts Store › Phillips Machine Screw - Flat Head, 3/8"-16 x 3" Image 1 of 1 Phillips Machine Screw - Flat Head, 3/8"-16 x 3" $31.11 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Flat Washer, 1/4", .050" Thick, OD 1/2" (A/N Style) $11.46 Phillips Tapping Screws - Oval Head, #12 x 2" $30.67 Nylon Flat Washer 1/2", 0.62" Thick, OD 1-1/4" $36.72 Stainless Cotter Pin 1/8" x 2" $18.81 Phillips Tapping Screw - Truss Head #10 x 1-1/4" $50.76